crisis in ukraine for the first time. >> russian troops firing warning shots over the heads of ukrainian troops. >> a dangerous situation. >> we condemn the russian federation's act of aggression. >> the white house confronting major challenges. >> prepared to make sure that the rights of all ukrainians are upheld. >> the u.s. ended all military relation with creme zblin merkel told president obama that she wasn't sure putin was in touch with reality. >> he's seeing the western hand behind everything. >> putin doesn't believe that the cold war is over. >> soldiers currentfully crimea, they're not russian soldiers at all. >> putin is, in many ways, i think, delusional about this. >> there is no sign of agreement. >> we stand on the side of history, a sovereignty that is able to make their own decisions about their own lives. >> it's not appropriate to invade a country and at the end of the gun pick what you are trying to achieve. >> stand-off continues and the stakes remain high. as deadlocked between russian and ukrainian forces continued, new reports hours ago show that russia test fire